git: pci: Support PCI Express Configuration Space memory-mapped access mechanism

[Sepherosa Ziehau]

On Thu, May 24, 2012 at 5:15 PM, YONETANI Tomokazu <y0n3t4n1 at gmail.com> wrote:
> On Thu, May 24, 2012 at 09:25:33AM +0800, Sepherosa Ziehau wrote:
>> >> http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/926777f68f1249ebbd1561eecc6fa75576bd4e10
>> >
>> > This commit causes D510MO (an Atom D510-based mini-ITX machine) to hang
>> > during boot where it usually prints the following on the screen
>> > (I don't remember the map[] lines are fully shown).  The lastest master
>> > (db421eef8) with `git revert 926777f6' boots OK.
>>
>> Does set tunable hw.pci.mcfg to 0 help?
>
> Aha, 926777f6 has changed the default value of hw.pci.mcfg to 1.
> I overlooked that when I was looking at the patch.  After adding
> hw.pci.mcfg=0 to /boot/loader.conf, the box booted without a problem.
>
>> Physical memory chunk(s):
> 0x00020000 - 0x0007ffff, 393216 bytes (96 pages)
> 0x00100000 - 0x001fffff, 1048576 bytes (256 pages)
> 0x03540000 - 0xcee9ffff, 3415605248 bytes (833888 pages)
> 0xceec0000 - 0xcef3ffff, 524288 bytes (128 pages)
> 0xcefc0000 - 0xcefdffff, 131072 bytes (32 pages)
> 0x100000000 - 0x12ffdffff, 805175296 bytes (196576 pages)
> avail memory = 3935059968 (3752 MB)

Could you test the latest master w/ following commit:
f018bb2e486c981356d94f730dc1729c293ae666

Give me the line looks like:
PCIe: Memory Mapped configuration base @ 0xe0000000, bus [0, 63]

And the bootverbose dmesg of the booting system, thanks

Best Regards,
sephe

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Tomorrow Will Never Die